This also works when the polymorphic model is accessed via
ForeignKeys, ManyToManyFields or OneToOneFields.

Features

Full admin integration.

ORM integration:

support for ForeignKey, ManyToManyField, OneToOneField descriptors.

Filtering/ordering of inherited models (ArtProject___artist).

Filtering model types: instance_of(...) and not_instance_of(...)

Combining querysets of different models (qs3 = qs1 | qs2)

Support for custom user-defined managers.

Uses the minumum amount of queries needed to fetch the inherited models.

Disabling polymorphic behavior when needed.

While django-polymorphic makes subclassed models easy to use in Django,
we still encourage to use them with caution. Each subclassed model will require
Django to perform an INNER JOIN to fetch the model fields from the database.
While taking this in mind, there are valid reasons for using subclassed models.
That’s what this library is designed for!